ABSTRACT
A century ago, publication of George J. Romanes’ Animal Intelligence (1882) marked the beginning of the field of comparative psychology, a field that sought to define the dimensions of animal intelligence and to compare the intelligence of humans and animals. (For more on the origins of comparative psychology, see Jaynes, 1969, and Warden, 1928.) Romanes had been a close acquaintance of Charles Darwin and later published some of Darwin’s notes posthumously in a second book, Mental Evolution in Animals (1883). Thus, in approaching the many questions of animal and human intelligence, Romanes accepted Darwin’s evolutionary thesis and adopted Darwin’s inductive approach, amassing voluminous reports relating exceptional feats of animal intelligence.
